Booster for exhaust steam



Sept. 6, 1932. B. s. NELSON BOOSTER FOR EXHAUST STEAI Filed Apg. 11, 195o s sheets-sheet 1 Sept-'6, 1932 B. `s NEL-zoN 1,875,754

BOOSTER FOR EXHAUST STEIAM `Filed Aug. 11. 1950 3 Sheets-Sheet 2 i x N Sept. 6, 1932. B. s. 'NELSON 1,815,754

BOOSTER FOR EXHAUST STEAM Filed Aug. 11; 1930 3 Sheets-Sheet 3 BERNARD STANLEY NELSON; OE: jLooxETTya COMPANY, LTD.,

Patented Sept. 6, 1932 UNITED Si'm'fiis PATENT OFFICE i NEW ORLEANS, LOUISIANA, AssreNon. :mo L :IL OE NEW ORLEANS, LOUISIANA, -.A lCORPORATION OF `BOOSTER EOE. EXHAUST STEAM Application niedAugm 11, i930. serial No. 474,630.

' This invention relates, generally, `to boosters for exhaust steamits object, broadly,"being to prOvidem'ea-ns yfor mixinga certain amountof live steam 'with exhaust so as to increaseits'temperature and pressure to a point where it may be used lfor various purposes which do not require live steam and wherein the .use of heated exhaust steam is more efficient and economica-l; There are many ,types of modern industrial and manufacturing plants in connection with which this invention may be'employed, and there are various uses insuch plants to which it maybe put.

For the `'purpose of illustration, but notin ny way asal limitation, I have elected to show the invention as used in a` sugar mill and, particularly, as used in conn'ection with certain evaporators therein employed;v

More particularly, .the objects of the inven tion are as follows? First, to construct a booster for exhaust steam in such a way as to permit a very thorough and speedy admixture of live steam 1;. with the exhaust steam.

Second, to provide auxiliary means, readily controllable, which will permit a highly increased amount of live steam to be added, for emergency use. l

Third, to accurately limit and control the flow of live steam by means of back pressure.

Fourth, other objects will be manifest from the detailed description of the invention to follow and to be specifically pointed out in the appended claims.

These Objects are attained in the manner hereinafter set forth, reference being had to the accompanying three sheets of drawings, in which:

Figure 1 is a diagrammatic view illustrating the steamsystem of a sugar mill, and showing the invention as applied in connection with certain evaporators in such system;

Figures 4 and 5 are views similar to'ligure` 2 but illustrating certain modified forms of the invention;A ,Y A Referring in the first instance to Figure 1 of the drawings, steam, system embodying a or boiler l0, a liveI steam branches '11, 1lb and llcleading, ,respectively there is'shownf a sugar. millv steam generator" supply line 11,'

to engines 12p'umps`1'3g`and other llive 'steam using apparatus 14. From 'these' pieces ofy Alive steam using apparatus depart, respectively, exhaust lines 15a, ljlandv 15, each in communication with a mainexhaust line 15.

'The' exhaust line `15 carries the exhaust steamto a booster 16 wherein it is `heated for further use by havinggmixed with itaycertain Vamount of live steam supplied through a branch pipe 17 j from the mainlive` steam line 11 andfrom whence Vthe heated'exhaust steam 1s deliveredzto it is utilized.

As before :pointed out, it isnot only .in sugar mills that my invention .may beLused,

yevap orators 18, 4 wherein nor, therein, is its uselimitedy to evaporators.

in a sugar'milfl, it may be used inconnection withvacuum pans, Oro'ther equipment, as those skilledin the artA will readily understand.

Referring to Figures 2'and ofthe-drawings, wherein my inventionis illustrated-in detail, thebooster 16v is shown as .being pro.; vided with a mixingcham'ben ,1'9to whichexhaust steam from `the line, 15- `is admitted through a port 20,;and' from whicli heated steam is delivered, to the vevaporators518, through aport-21. Situated at thatfendof the booster removed from the delivery'fpo'rt '.21 is alma'nifold, 22

For example,

toV which live steam is admitted' from the supply pipe 17, and fromi it' is-fdis charged, into the vmixing ch'amberlt), through a seriesofnozzles 23. u

To accurately control? 'the amount. `of live steam to be admittedtothe booster inlorder that the best results may b`e'o`bta1ned` there is interposed*injtheisupply line 17 controlele'- ments comprising an automatic pressurereg'- ulator 24 of any desiredtype, vand flanking cut-olf'valves 25 and26, 'asshownin Figure 2.

fw'In order that a further control may be be admitted, and this to CFL exercised over the amount of live steam to be governed by the amount of back pressure in the booster, a pipe 27 is provided leading from the mixing chamber 19 at a point 28 adjacent the delivery port 21 to the. pressureregulator 24. Thispipe 27 is provided with a valve 29 whereby it may be closed, if desired. p

A back pressure safety valve 3() is preferably'providem'the same Vbeing in communication with the mixing chamber 19 at a point 31 adjacent its delivery port.v

At times, an emergency may 'occur' when it is desirable or even necessary to quickly permit a much greater amount of'live steam to enter the mixing chamber than will be permitted by Athe automatic vpressure i, control mechanism. Foreseeing such emergencies, I provide a by-pass pipela around the pressure control meanssuchpipe leading from the supply line: 4v17 outwardly Abeyond the control elementsfp'assing through the manifold 22, andterminating-in a nozzle 23a in line with the nozzles23 and adapted to*l shoot live steam r directly into the mixing chamberlt). ','Ihis byfpass pipe isE normally closed by means of avalve 32 whichmay be quickly opened in the yevent of necessity. Y Y t In thatmodifi'catio'n of my invention shown in Figure t V'ofthe drawings, an annular manifold 22a is provided inplace of the one as shown in the preferred vform of the invention, the exhaust steam admission port 2Ov is at the end ofthe mixing Vchamber 19 rather thanat a side,thereof,the safety valve 80 is differently positioned, and the necessary,Y rearrangement of live steam supply pipes is effected.l Y, A, j

In that modification of my inventionzshown in Figure ofthe drawings, the safety valve Vils differently positioned in yet other mankjacent to said nozzles,

admitting live steam to said manifold, a series of live Vsteam discharge nozzles projecting from said manifold into the inlet end of said mixingchamber, and supplementary means, independent of said manifold, for admitting live steam tothe inlet end of said mixing chamber in proximity with the live steam discharged from said nozzles.

2. The combination, in a booster for exhaust steam, of a casing enclosing a-mixing chamber having an inlet end and anoutlet end, means. for admitting exhaust steam to the inlet end of said chamber, a manifold, means for admitting' live steam to saidy manifold, means actuated by the resultant pressure of the mixed live and .exhaust steamsat-the outlet end of said mixing chamber for exclusively controlling said live Vsteam admitting means, a series of livesteam'discharge nozzles projecting from said manifold into theinlet end of said mixing chamber, supplementary means, independent of said manifold and adfor admitting live steam at the inletend of said mixing chamber, and manually operable `means for ycontrolling said supplementary live steam supply to said mixing chamber. A f, Y

In testimony whereof, I khereunto affix my signature.

BERNARD 'STANLEYNeilson.V v

ner; and another different rearrangementof the live steam supply pipes is made.l

A, From lthese disclosures many Changes,

rearrangements and modifiit is evident that i cations may be made in my invention without departure ,from they yspirit thereof, which comprises the introduction yof jets of high pressure .steam in the lthroat of a properly proportioned VenturiI tube to so impart the kinetic energy of the high pressure steam ex-y panding through the 4jet nozzle by impact on to the loW` pressure steam so as to give itsufficiently high velocity in the .throat of the Venturi tube,andbyconverting this velocity head into pressurenhead the pressure of the mixture of live and 'exhaust steam is raised several poundshigherrthan the ,original pressure of the exhaust-steam, and by so doing-I raise its temperature .to a level where the heat eov contained may be utilized, and I make the i claims with suchpossibilities in mind. '.What is claimed is.: i

`1. The combinatioman a booster forex- .hauststeam, of a casing enclosing a mixing 

